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Re: Bug#713943: Lack of i2c_powermac module may be the cause



Are you testing on a PowerMac G5 7,3?  Should be in /proc/cpuinfo.
I have a 7,3 model and cannot load the windfarm driver.  It appears that the hardware on the 7,3 is not supported.  I’ve been working to update the therm_pm72 driver to use the probe interface instead of the attach_adapter interface.  Maybe you’re hitting this issue?


On Feb 22, 2014, at 4:44 AM, Rick Thomas <rbthomas@pobox.com> wrote:

> On Feb 22, 2014, at 12:23 AM, Erik de Castro Lopo <erikd@mega-nerd.com> wrote:
> 
>> Hi,
>> 
>> I run debian testing on a dual G5 powermac.
>> 
>> Just upgraded from linux-image-3.4-trunk-powerpc64 to
>> linux-image-3.12-1-powerpc64 and found the same issue. The windfarm
>> modules are loading but the about 30 seconds to a couple of minutes
>> after booting to 3.12-1-powerpc64 the fans speed up to full speed.
>> 
>> lsmod says the windfarm modules are being loaded, and its the same
>> modules being loaded under the 3.4 kernel.
>> 
>> I have however found a difference. On 3.12 I get:
>> 
>>> dmesg | grep windfarm                 
>>   [    4.358299] windfarm: initializing for dual-core desktop G5
>> 
>> whereas on 3.4 I get:
>> 
>>> dmesg | grep windfarm                 
>>   [    4.791589] windfarm: initializing for dual-core desktop G5
>>   [    9.077416] windfarm: CPUs control loops started.
>>   [   12.440957] windfarm: Backside control loop started.
>>   [   12.491701] windfarm: Slots control loop started.
>>   [   12.592933] windfarm: Drive bay control loop started.
>> 
>> Definitely something wonky there.
>> 
>> Erik
> 
>> Erik de Castro Lopo wrote:
>> 
>>> Hi,
>>> 
>>> A previous message in this bug suggested that the i2c_powermac module 
>>> may be involved.
>>> 
>>> I can confirm that this module is missing completely for the 3.12 kernel
>>> (there is no module of that name in the /lib/modules/3.12-1-powerpc64/
>>> tree) whereas for the 3.4 kernel this module is available and is being
>>> auto-loaded.
>> 
>> It seems that the i2c_powermac module from 3.4 is now called i2c-powermac
>> (underscore replaced with a minux sign).
>> 
>> Manually loading the i2c-powermac module results in fans that run at the
>> normal. expected low speed. I will be adding this to /etc/modules as a
>> workaround for this issue.
>> 
>> A question about kernel modules, can one module (eg windfarm_core) be
>> made to depend on and auto-load another (eg i2c-powermac)?
>> 
>> Erik
>> -- 
>> ----------------------------------------------------------------------
>> Erik de Castro Lopo
>> http://www.mega-nerd.com/
>> 
>> -- 
>> To unsubscribe, send mail to 713943-unsubscribe@bugs.debian.org.
>> 
> 
> 
> I'm forwarding this to the debian-powerpc list, incase someone there can help!
> 
> Rick
> 
> 
> 
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